@article{FORUM_1997__9_2_141810,
     author = {Reinhard Schultz and Slawomir Kwasik},
     title = {Isolated fixed points of circle actions on 4-manifolds.},
     journal = {Forum mathematicum},
     pages = {517--546},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1997},
     zbl = {0890.57017},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1997__9_2_141810/}
}